package org.example;

import java.io.*;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.util.Scanner;
import java.util.Stack;

public class Alg {
    public static void main(String[] args) throws IOException {
        Stack<Integer> integers = new Stack<>();
        boolean ret = integers.add(1);
        System.err.println(ret);

    }
}
